An atom 17 protons, 17 electrons and 18 neutrons has a mass number of? by Sunday | Aug 22 | Chemistry WAEC | 0 comments A. 17 B. 18 C. 34 D. 35 E. 52 Correct Answer: Option D – 35 Users Also Read These:An atom W has 17 electrons and 18 neutrons. Which of…How many electrons will be found in the nucleus of…An isotope has an atomic number of 15 and a mass…The nucleon and proton numbers of a neutral atom of…The nucleon number and the proton number of a…